Firearm magazine base plate



FIG. 1 is a front perspective view of a firearm magazine base plate, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a left elevation view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line in the drawings depicts unclaimed portion of the plate only and forms no part of the claimed design. 

CLAIM The ornamental design for the firearm magazine base plate, as shown and described. 